Fix typo

Change-Id: I1e3ce93fb4aa475fb73a2521a0127d37a5b84dc1
Reviewed-on: https://gerrit.libreoffice.org/72326Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Julien Nabet <serval2412@yahoo.fr>

drawinglayer/source/attribute/fillgraphicattribute.cxx

@@ -56,7 +56,7 @@ namespace drawinglayer
             {
                 // access once to ensure that the buffered bitmap exists, else
                 // the SolarMutex may be needed to create it. This may not be
-                // available when a renderer works with multi-treading.
+                // available when a renderer works with multi-threading.
                 // When changing this, please check if it is still possible to
                 // use a metafile as texture for a 3D object
                 maGraphic.GetBitmapEx();